Presented below is selected information for three regional divisions of Medina Company, Contribution margin Controllable margin Average operating assets Minimum rate of return North $301.000 $141.000 $940,000 12 % Divisions West $500,500 $360,000 $2,000,000 14 % South $399,300 $208,500 $1,390,000 10 % a) Your answer is correct. Compute the return on investment for each division North Division 15 % West Division 18 South Division 15 96 Your answer is incorrect Compute the residual income for each division, North Division $ West Division $ South Division $